Thoracic pressure maintenance aid



FIG. 1 is an exploded perspective view of the thoracic pressure maintenance aid embodying the design of the present invention;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of the front shown in FIG. 2;

FIG. 3 is a side elevational view thereof, the side opposite being a mirror image of the side shown in FIG. 3;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is an assembled, open top perspective view thereof. 

The ornamental design for a thoracic pressure maintenance aid, as shown and described. 